永磁同步电机低载波比精确无差拍预测电流控制  

Precise Deadbeat Predictive Current Control of PMSM With Low Carrier Ratio

作　　者：卢宏平 赵文祥[1] 陶涛 王化南 钱渊方 王政[2] LU Hongping;ZHAO Wenxiang;TAO Tao;WANG Huanan;QIAN Yuanfang;WANG Zheng(School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu Province,China;School of Electrical Engineering,Southeast University,Nanjing 210096,Jiangsu Province,China)

机构地区：[1]江苏大学电气信息工程学院,江苏省镇江市212013 [2]东南大学电气工程学院,江苏省南京市210096

出　　处：《中国电机工程学报》2025年第3期1108-1117,I0025,共11页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家杰出青年科学基金(52025073)。

摘　　要：永磁同步电机预测电流控制具有动态响应快、控制结构简单等优点。但在低载波比工况下传统无差拍预测控制存在电流预测误差和指令电压计算误差较大、转矩和磁链耦合严重等缺陷。该文提出一种同时适用于永磁同步电机高、低载波比运行的精确无差拍预测电流控制方法。首先,建立考虑转子磁链定向误差的永磁同步电机定子电压方程,将dq坐标系视为静止坐标系,同时考虑转子在控制周期内的旋转过程,对电机进行动态建模,解决了低载波比下转子磁链定向误差导致的交直轴耦合问题;同时,进一步提出多坐标系变量同步方法,消除多坐标系变量跨空间计算导致的预测误差和指令电压误差,实现了低载波比精确无差拍预测电流控制。实验结果表明,所提DPCC方法在低载波比工况下具有更好的转矩磁链解耦能力、dq轴电流预测精度和跟踪精度。The predictive current control of permanent magnet synchronous motor(PMSM)has the advantages of fast dynamic response and simple control structure.However,under the condition of low carrier ratio,the traditional DPCC has defects such as large current prediction error and instruction voltage calculation error,and severe torque and flux linkage coupling.This paper proposes an accurate DPCC method suitable for both high and low carrier ratio operation of PMSM.First,the modified stator voltage equation of PMSM is established considering the rotor flux orientation error,the dq coordinate system is regarded as a static coordinate system,the rotation process of the rotor in the control period is considered,and the dynamic modeling of the motor is carried out to solve the quadrature and direct axis coupling problems caused by the rotor flux orientation error under the carrier ratio.Simultaneously,a multi-coordinate system variable synchronization method is further proposed,which eliminates the prediction error and instruction voltage error caused by the cross-space calculation of multi-coordinate system variables,and realizes accurate DPCC with low carrier ratio.The experimental results show that the DPCC method proposed in this paper has better torque flux decoupling ability,dq axis current prediction accuracy and tracking accuracy under low carrier ratio conditions.

关 键 词：永磁同步电机 低载波比 电流预测 改进电压方程 坐标系同步 

分 类 号：TM351[电气工程—电机]